Vixen Telescope Dovetail Slide Bar MDescription A plate for balancing optical tube This is a plate to balance an optical tube. Replace it with an attachment plate and use it. Length 205 mm. Specs Size 211mm x 50mm x 21mm Weight 270g 9. 52oz Warranty Vixen warranties its products to be free from initial defects in materials and workmanship for a specified period based on part type: Vixen Electronic Parts: Limited One Year Warranty Vixen Mechanical Parts: Limited Two Year Warranty Click