Meade to Celestron Adapter - Meade 16" SCT to Celestron 3-1/4" Thread. Converts large Meade 4-inch thread for large Celestron accessories. 

Specifications

Telescope Side Connection: Meade 4"x 16tpi Female Thread

Celestron 3.29"x 16tpi Male Thread

• Outside Diameter: 4.45" (113mm)
• Overall Height: 1.02" (25.9mm)
• Clear Aperture: 3" (76.2mm)
• Weight: 4.8 oz (136.1 g)
• Back-Focus Usage: 0.62" (15.75mm)
• Drawing