We recommend you pick up the Small size for car interiors or delicate surfaces and the Large size for your exterior surfaces or heavy dirt ones. Short Handle (6.5 ) for car interior use, Dashboards, Instrument Clusters, Navigation Screens, Infotainment, Air Vents, Woodwork, Gauges, Buttons, Knobs, Piano Black panels, laptops, keyboards, camera lens, pieces of art, or even plants. Long Handle (9.25 ) for seats, leather or exterior Surfaces, Wheels, Trim Work, Grill, Molding, EmblemBadge Features Detailing Brushes are specifically designed for Medium to Heavy Duty Cleaning on delicate surfaces Ergonomically textured grip handle, to minimize fatigue on longer usage Materials used are chemical resistant plastic handle and synthetic microfiber soft long hair Durable and reusable on both wet and dry usage Maintenance Always use a sparkle clean dry brush when you start cleaning for scratch free results. Please wash brushes with clean water right after usage. If heavy dirt, use multipurpose cleaner and rinse thoroughly with clean water. Squeeze the brush head, after cleaning, and keep the brushes soft and hang it upside down. Microfiber cloth Premium 800 gsm microfiber dual sided plush (80 percentage polyester and 20 percentage polyamide) in 16 x16 size for ideal handling and control. Super Absorbent Lint Free Streak Free, absorbs moisture and quickly drying the surface you are cleaning. The edging on towel is from heavy duty material that is durable and scratch free. Avoid using microfiber towels to wipe greasy dirt or rust. Maintenance Use clean warm water to wash your microfiber cloth right after usage For heavy dirt, clean the towel using a soft detergent, that does not contain fabric softener and bleach. Fabric softener will seriously affect the absorption property. The water temperature should not exceed 60 Degree Celsius. Do not put it in clothes dryer Keep it in a ventilated and dry place, do not high temperature drying or insolation