Mechanical Seal Kit suits all SpaNET Jetmaster, Davey QB series, LX Whirlpool pumps. See list below. Also check measurements if in doubt.

Dimensions:

• Spring Section: OD of Rubber: 41.5mm / ID: 17.4mm
• Ceramic Section: OD of Rubber: 35.5mm / ID of Ceramic: 18.95mm

Suits:
LX Whirlpool TDA, WP, LP, EA, JA Series
LX Whirlpool / Monalisa /
LX Whirlpool
LX Whirlpool /
LX Whirlpool /
LX Whirlpool /
Davey
Davey QB1501
Davey QB2001 / QB2002 / QB2001AUS / QB2002AUS-AMP
Davey /  / QB2501AUS / QB2502AUS-AMP
Davey QB3001 QB3002 / QB3001AUS / QB3002AUS-AMP

This fits all Davey QB / LX Whirlpool WP and LP / SpaNet Jet pumps and many others. 5/8 Booted Cup with 3/4" Ceramic face.

Replaces:
Davey QB2001, QB2002, QB2501, QB2502, QB3001, QB3002
SpaNET XS-30, XS-30S, XS30-2S, XS3C
LX Whirlpool LP200, LP250, LP300, WP200-II, WP250-II, WP300-II, WP200, WP250, WP500
LX Whirlpool EA390, EA450, TDA100, TDA150, TDA200, JA35, JA50, JA75 <--after 2007
Spa Systems Pirahna

Note: there are some obscure early "Chinese" variants of LX pumps that may use different parts. Please ensure you double check measurements & photos.