The QA1 valve disc kit supplies eight replacement discs intended for valve servicing and rebuilds. The description lists .542 in OD x .010 in thick; no extended metric detail is provided. QA1 supports replacement and service needs with a range of parts and technical assistance, making this compact disc set a straightforward option when specific small-diameter disc sizes are required for maintenance.
QA1 Valve Disc Kit - .542in OD x .010in Thick - 8 Pack