Series 4 Triple Offset
Series 40/41 Split Body Lined
Series 42/43 Lined
Series 44-49 High Performance Double Offset
Series 50/52 Resilient Seated
Series 51/53 Large Diameter Resilient Seated
Series 55 Double Flanged Double Offset Resilient Seated
Series 5C/5D Split Body Resilient Seated
