The rubber washer is compatible with the Boss Bidet Brass Adaptor. The Boss Bidet Brass Adaptor and Rubber Washer are included with the Boss Bidet Bold.
Adaptor and Rubber Washer Size By Region:
7/8 inch - USA, Canada, Central & South America
3/8 inch - Europe
1/2 inch - Asia, Middle East, UK, Australia, New Zealand
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