Would these be suitable to replace washer on hot water bottle screw cap which has started to melt??

If the damaged washer is actually an O-ring with circular Cross Section - Possibly. In addition, the cross-sectional diameter of the ring & the Overall diameter would need to match one of those provided in the kit. If the existing washer is actually a 'washer' i.e., with a rectangular cross-section, then you would be taking a chance.

Will any of these fit on the bosch pressure hose?

As I do not know the dimensions of the Bosch pressure hose, it is not possible to answer this specific question. However, the pack of O-ring gaskets has a good range if sizes (as indicated in the illustration) and I think it is highly likely that there will be a gasket to fit the hose.

It is size for inner or outer please?

They are all different sizes. I just kept swapping them about until I found one that fitted well!

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250 Pcs O-Ring Assortment Kit, NBR Rubber Washers Seals, 15 Sizes Black O Rings with Organizer Box, Oil/Heat Resistant Gasket Set for Plumbing, Automotive, DIY Repair

250 Pcs O-Ring Assortment Kit, NBR Rubber Washers Seals, 15 Sizes Black O Rings with Organizer Box, Oil/Heat Resistant Gasket Set for Plumbing, Automotive, DIY Repair

Product ID: 343476991

Details

Material
Rubber
Nominal inside diameter
0.3
Item diameter
1.9
Brand
ZHENGYYUU
Colour
Black

📦Organizer box for quick access

🔥Heat resistant up to 120°C

🛠️250 pcs versatile kit

€ 10.51

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Description

🔧 Seal the deal with confidence—because every fix deserves the perfect ring!

LONG TERM RELIABILITY - High tensile strength and airtight sealing mean fewer replacements and more peace of mind.
EFFORTLESS ORGANIZATION - Transparent, compartmentalized box keeps your O-rings sorted and ready for any emergency fix or project.
UNIVERSAL COMPATIBILITY - Perfect for plumbing, automotive repairs, DIY projects, and industrial applications—your go-to sealing solution.
ALL IN ONE O RING ARSENAL - 250 premium NBR rubber rings in 15 essential sizes—never scramble for the right seal again.
BUILT TO WITHSTAND THE HEAT - Engineered to resist oil, wear, and temperatures up to 120°C, ensuring leak-proof durability under pressure.

This 250-piece O-Ring Assortment Kit features durable nitrile rubber (NBR) washers in 15 sizes, designed for superior oil and heat resistance up to 120°C. Packaged in a transparent organizer box, it offers easy access and efficient storage, making it ideal for plumbing, automotive, and general DIY repairs. With high tensile strength and airtight sealing, this kit ensures reliable, long-lasting performance across a wide range of applications.

Specifications

ASIN	B095Y3G6WV
Best Sellers Rank	43,827 in DIY & Tools ( See Top 100 in DIY & Tools ) 61 in Tap O-Rings
Brand	ZHENGYYUU
Colour	Black
Country Of Origin	China
Customer Reviews	4.6 out of 5 stars 1,461 Reviews
Item Diameter	1.9 Millimetres
Item diameter	1.9 Millimetres
Manufacturer	ZYGGG
Manufacturer Part Number	ZYGG-250019
Material	Rubber
Model Number	ZYGG-250019
Nominal Inside Diameter	0.3 Centimetres
Nominal Outside Diameter	1.9 Millimetres
Nominal inside diameter	0.3 Centimetres
Nominal outside diameter	1.9 Millimetres
Number of Pieces	250
Set Name	O-Ring Set
Temperature Range	1.2E+2 Degrees Celsius
UPC	719710753181
Unit Count	250 count

Reviews

D**3

Bound to fit

Excellent selection of sizes, handy box-let's hope the catch doesn't fail! (plastic). Great value for money

11.02.2026

B**N

good quality Os

used to change the O ring on car sump plug, fits perfect and no issues with leaks, good quality

1.07.2026

A**R

Works very

Great selection at good price

18.07.2026

K**L

on time

spot on as normal

26.06.2026

A**R

Just the job

Excellent

3.06.2026

F**T

recommended

All perfect A++

31.05.2026

K**H

Okay

15.07.2024

P**S

Handy

Handy to have when needed

14.06.2026

H**E

Parfait

Je n'étais pas sur de la taille de joint necessaire. Cet kit des joints de tailles très variées m'a permis de choisir la taille qu'il faut. Pratique!!! La qualité me paraît bonne mais il faut attendre un peu pour la savoir.

21.08.2022

M**D

Correcte

Dimension manque de clarté

2.04.2024

F**Y

Guarnizioni

Moltissimo utili

17.07.2025

N**O

Jest ok

Uszczelki są spoko. Nie mam zastrzeżeń.

9.11.2025

A**L

PERFECTAS

El pedido llegó más rápido de lo esperado y en perfecto estado. Va en una caja con separadores como se ve en la foto. Yo necesitaba las más pequeñas que se me perdieron unas idénticas de una conexión a un aparato y me han venido de maravilla. Las grandes también las he aprovechado para ponerlas en un túdel de un clarinete. Infinidad de usos. Siempre vienen bien. Y muy baratas. Las recomiendo

5.05.2023

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€ 10.51

Duties & taxes included

In stock

Sold byAmazon GERMANYDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to GERMANY.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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The product quality is outstanding. Exactly what I needed for my work.

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