【COMPATIBILITY】: Compatible with Oster Pro 1200 Blender. Fits Models: BLSTMB-BBG-000, BLSTMB-CBF-000, BLSTMB-CBG-000, BLSTVB-103-000, BLSTVB-104-000 . This item fits Oster Pro 1200 and Master Series blenders only. . This is an aftermarket item made to fit Oster Pro 1200 Blenders Jar Base Bottom Cap: 1. Compatible with Oster & Osterizer Part # 179854-000-000 2. This replacement is compatible with Oster Pro 1200 base and Newer Master Series with motor top opening of 4.25 Inches. 3. The top opening of the base must be 4.25". Please measure your motor base opening before purchasing 【Easy Installation, No Tools Needed】 You don't need to be a repair expert! Replacing these worn parts is simple and quick. Typically, all you need is your hands to unscrew the old base cap and swap in the new parts, The included high-quality silicone gaskets create a superior seal to prevent leaks, a common issue with old, cracked seals saving you time and costly appliance repair service fees. 【Restore Peak Performance & Extend Blender Life】 Worn blades and leaky seals drastically reduce your blender's efficiency. Installing this fresh kit will immediately bring back powerful, smooth blending and prevent liquid seepage that can damage the motor base.Well-Designed, made of high quality food grade materials and stainless steel, BPA free & Dishwasher safe, rigorously tested, no leaks, durable and longevous. It's the most cost-effective way to revive your valuable for Oster 1200 【PACKAGE INCLUDES】: Includes 6-Prong Stainless Steel Cutter Blade(164160), Jar Base Cap & 4 silicone Sealing Gaskets(182341-000-842) - Part #164160